[1] COMER S. D., LE TOURNEAU J. J.:
Isomorphism types of infinite algebгas. Pгoc. Ameг. Math. Soc., 21, 1969, 635-639.
MR 0238752
[3] KOPPELBERG S.:
A complete Boolean algebra without homogeneous or гigid factors. Math. Ann., 232, 1978, 109-114.
MR 0462953